Can you find out the missing number in the grid?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

What number do you get when you multiply all of the numbers on a telephone's number pad?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What came first, the chicken or the egg?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

If eleven plus two equals one, what does nine plus five equal?